The undecimal augmented fourth, or 15/11, is the difference between the 11th and 15th partials of the [[OverToneSeries|harmonic series]]. It is 536.95 [[cent|cents]] wide, exactly [[45_44|45/44]] larger than a perfect fourth, and almost exactly a sixth-tone sharper than a [[12edo]] fourth. It is narrower than [[11_8|11/8]] by exactly [[121_120|121/120]]. 15/11 can be called a [[superfourth]], as it falls between the [[interval category|interval categories]] of [[perfect fourth]] and [[tritone]]. 4 steps of [[9edo]] is an excellent approximation for 15/11.
The undecimal augmented fourth, or 15/11, is the difference between the 11th and 15th partials of the [[OverToneSeries|harmonic series]]. It is 536.95 [[cent|cents]] wide, exactly [[45/44|45/44]] larger than a perfect fourth, and almost exactly a sixth-tone sharper than a [[12edo|12edo]] fourth. It is narrower than [[11/8|11/8]] by exactly [[121/120|121/120]]. 15/11 can be called a [[Superfourth|superfourth]], as it falls between the [[interval_category|interval categories]] of [[Perfect_fourth|perfect fourth]] and [[tritone|tritone]]. 4 steps of [[9edo|9edo]] is an excellent approximation for 15/11.
See: [[Gallery of Just Intervals]]</pre></div>
See: [[Gallery_of_Just_Intervals|Gallery of Just Intervals]] [[Category:11-limit]]
The undecimal augmented fourth, or 15/11, is the difference between the 11th and 15th partials of the <a class="wiki_link" href="/OverToneSeries">harmonic series</a>. It is 536.95 <a class="wiki_link" href="/cent">cents</a> wide, exactly <a class="wiki_link" href="/45_44">45/44</a> larger than a perfect fourth, and almost exactly a sixth-tone sharper than a <a class="wiki_link" href="/12edo">12edo</a> fourth. It is narrower than <a class="wiki_link" href="/11_8">11/8</a> by exactly <a class="wiki_link" href="/121_120">121/120</a>. 15/11 can be called a <a class="wiki_link" href="/superfourth">superfourth</a>, as it falls between the <a class="wiki_link" href="/interval%20category">interval categories</a> of <a class="wiki_link" href="/perfect%20fourth">perfect fourth</a> and <a class="wiki_link" href="/tritone">tritone</a>. 4 steps of <a class="wiki_link" href="/9edo">9edo</a> is an excellent approximation for 15/11.<br />
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See: <a class="wiki_link" href="/Gallery%20of%20Just%20Intervals">Gallery of Just Intervals</a></body></html></pre></div>
The undecimal augmented fourth, or 15/11, is the difference between the 11th and 15th partials of the harmonic series. It is 536.95 cents wide, exactly 45/44 larger than a perfect fourth, and almost exactly a sixth-tone sharper than a 12edo fourth. It is narrower than 11/8 by exactly 121/120. 15/11 can be called a superfourth, as it falls between the interval categories of perfect fourth and tritone. 4 steps of 9edo is an excellent approximation for 15/11.